Evangelism isn't the primary job of the assembly. Here are just a few. Notice how they often involve having relationships & intimate relationships with one another.
1 Peter 4:8-11
“Above all, love each other deeply, because love covers over a multitude of sins. Offer hospitality to one another without grumbling. Each one should use whatever gift he has received to serve others, faithfully administering God's grace in its various forms. If anyone speaks, he should do it as one speaking the very words of God. If anyone serves, he should do it with the strength God provides, so that in all things God may be praised through Jesus Christ. To him be the glory and the power for ever and ever. Amen.”
“Each of us should please his neighbor for his good, to build him up.”
“Rejoice with those who rejoice; mourn with those who mourn.”
“Be devoted to one another in brotherly love. Honor one another above yourselves.”
“You, my brothers, were called to be free. But do not use your freedom to indulge the flesh; rather, serve one another in love.”
“Let us consider how to stir up one another to love and good works, not neglecting to meet together, as is the habit of some, but encouraging one another, and all the more as you see the Day drawing near.”