No. If you want to be a good friend, you'll respect their choice, in the end. Heck, I think you're absolutely rude for not giving into your friend's simple request, trying out Roblox no matter how stupid it is, even after he did that favor for you. You're not sounding like a good friend at all in this scenario.
You'll find that a LOT of people -hate- roleplay. They think we're weirdoes stuck in a fantasy world. Nothing much we can do, nor should we care.