The bottom line when it comes to church is — the sermon!
Church attendance reflects the pulpit! We see that reality when a congregation knows that so-in-so is speaking tonight or next week. You will see attendance go up or down based on the sermonic expectations. 
As I listen to Alistair Begg, I am reminded again how crucial effective preaching is in ministry.
There is a reason those like Pastor Begg are so oft listened to by so many, and it is because not all preachers/teachers are effective.
I use the word “effectiveness” and not “successful” for a reason. We are called to be effective communicators because there are situations where one is effective but not successful. The field of endeavor is a challenging and complicated place to be successful– if “successful” means having a meaningful impact. There were situations where Paul was not very successful, but he was effective.
Some like to say that they are preaching to an audience of one — and that is accurate regarding the content of what is being said. We are called to preach what the Scriptures teach, not what God’s people would like to hear said.
Nevertheless, the truth is that none of us are preaching to only that audience. Rather, we work hard at message preparation because we know that there is an audience beyond that One.
Some preachers, like Alistair Begg, are consistently excellent — highly effective! They are clear, thought-provoking, insightful, easy to listen to, and concise.
AND . . . . there are preachers-teacher who are far from effective!
There is a continuum ranging from . . . .
“consistently great – repeatedly great – really good – good – adequate – mediocre – poor – bad -terrible.”
. . . and there is a test by which to evaluate where one is on that continuum!
— “Retellability” —
Are there those who “retell” what was said?
Are there those who remember, repeat, or “retell” what was said?
That is why Alistair Begg’s sermonic clip has gone viral!
What was so effective said by Alistair Begg challenged, moved, explained, clarified, and/or captured a truth worth retelling one’s self . . . .
. . . . and “retelling” others — “You have to listen to this!”
1. Church attendance may also reflect what is happening in church life. When serious issues are front and center, as is the case with many SBC churches, attendance is also affected. Dissatisfaction with decisions and leadership also impacts attendance.
Add to that, the presence of a good youth program, the variety of opportunities to serve, other spiritually beneficial programs (such as AWANA / Senior Saints / VBS), personal relationships, and pastoral care and concern. These, and others, all impact attendance to varying degrees and age groups.
“I kinda understood churches were for mutual encouragement and exhortation, not simply recieving from a single teacher, professional as they may be. I suppose I am in need of finding the purpose of the church as I read the New Testament”
I understand your viewpoint and appreciate it — I totally agree — and should have said what I have often said — there are two wings on the church airplane, preaching and fellowship.
No preaching/teaching, it is not a church, it is merely a social gathering.
No fellowship, it is not a church merely equal to streaming.
Both are as basic as you can get to be called a NT church.
Let me go on to say that no matter how great the fellowship is in any restaurant, if the meal is lousy I’m not going back and investing my time or money in a meal I find continually bland to terrible.
“The bottom line” — not the only line — has to be the preaching and teaching of God’s Word which also preaches and teaches fellowship and improves the fellowship.
But great fellowship will not improve the preaching/teaching!
I can be part of making fellowship, fellowship — but I can’t do much about bad preaching.
Nevertheless, your point is well taken and I will add this to the bottom of my post! It is a point worth making!