Ah, I thought he'd be all like "Whaatt?! Monster Tamer?! What a shitty class!"
I've been gladly proven wrong. Monster Tamer is an amazing class if you put actual effort into it, it starts off slow with only having slimes and shit available. but there's this thing called "Progression" that's apparently a foreign concept to Isekai MC's. They don't even give a second thought about it, instead of setting a goal like "Next, I'll tame an Orc!" or some other creature, they just sulk around until they go through a near-death experience and they have a fucking Jimmy Neutron Brain Blast and finally fucking realize that Monster Tamer is a dope class.
But yeah, glad that this MC is accepting of this class...though, he'd probably accept anything other than a hero.
Edit: Oh, and if they manage to max out their skill, they could like...have a S-Class monster like a dragon, or maybe even be able to tame The Demon Lord itself. The possibilities are fucking endless with a Monster Tamer class! It may not give instant results, but it sure as well would one hell of a long-term gain. (Another example; A whole fucking army of monsters. That would be dope as shit! And if you want someone to talk to, talk to a dryad or something)