If you only ride trail (what trails???) an MTB hardtail may be better, maybe a plus-tire. fatbikes are also capable for trail, but more optimized for snow, sand etc. I use mine on construction sites (look like moon craters when being developed), which may be hard with thinner tires. but for trails an MTB may be enough.
As for your flat, you should learn to fix it. what if you have a flat in the middle of nowhere? Even if you are tubeless, good to know how to.