While i did enjoy the ending as the manga has always been about remakes and it still fit the theme, i really hate the logic behind him declining the job, a helping hand is entirely different from what he was doing before which made the whole scene cringe
Also the VIce Principal is the CEO of Reddit
you're right, how would he know whether the company is really a scam or just typical vitamin company when he's only just heard of it?
He obviously should have said yes and thank you and taken the card then investigated the company after he said good bye , then he could decline his friend later if he thinks the company is not legit.
Declining his friend without even knowing about the company is just arrogant , especially doing it in such a dismissive way that burns the bridge. For all he knows, his friend from the idol group might be running a team of team of sales people at that company or anoother company in 6 months or a couple of years then he'll regret declining his business card and basically telling him he wants nothing to do with him.
Sales is the most important and lucrative skill in business and it's the one that's the most accessible and requires the least academic credentials plus it has a lot of cross over with the people skills he has already practiced and it's an area where he would benefit the most from his halo effect of being good loooking. So basically sales is the most perfect role for him and it's the biggest no brainer for him to get a sales job but instead for some reason he thinks developing and adapting his current skills and talents is "going backwards" or something.
so that scene with his friend wasn't "cool" or aspirational at all.
p.s. The guidance counselor is much more of a redditor , vice principal is more like a twitter user