“why do you think you are called upon to "spread the good news"?
It His choice to use whatever means and messengers He wants- there is a point of time still in the future when conditions will be extreme and the task will be given to an angel. For now, it’s one of the activities to which every believer is called.
Why us? I can only speculate. I’ve heard it described as “one beggar telling another beggar where to find bread”. Many of us were previously hostile to God so there’s something profoundly humbling and poetic in our change of allegiance. Perhaps He chose us because we are so utterly useless on our own and are dependent on Him to actually make anything worthwhile come of it. Of ourselves, we can achieve nothing of value.
And I regret that sadly I’ve seen some efforts that were purported to be spreading the good news have been nothing of Him and all about human self-promotion.
“what do you understand to be the difference between "spreading the good news" and seeking to recruit people to join the church aka converting them?”
When people hear how God has made a way for them to know Him, to be forgiven for their wrongdoings, to be in a relationship with Him forever as a free gift (that’s the good news) and then they receive that gift, (welcoming the Gift, Jesus Christ Himself into their lives) they undergo a fundamental change spiritually. As I said before all we do is the first part- pass on the messsge. When they receive Christ they are born of God’s Spirit, connected to Him where before there was a disconnect. He is now their Lord, and it’s up to Him to decide what they do next.
Maybe my own example will help explain. When I welcomed Christ to take over my life I wasn’t attending any church meetings nor did I know any Christians. After about a year of just Him and me and the Bible every day I asked Him if I could get baptised. Immediately I was invited by someone I’d never met before to go to her church where they were baptising people. I didn’t tell her I had been asking Him if I could get baptised. She had no idea. She just felt He wanted her to ask me. That became my church for the next few years until He took me somewhere else.
So this is how I see it. We just do what He tells us to do in every situation and He organises His people into relationships and groupings (churches, if you will) as He chooses. I’ve no connection to any particular denomination, and my personal preference is house church, which is the oldest form of church and the most widely practiced form of church worldwide. I really can’t speak for anyone but myself or give reasons why they do what they do. I just do what He tells me.