Minecraft would probably have enough content for you plebs if you upgraded to the latest version instead of being stuck in 1.7 purgatory because nobody has updated their mods since then
ive played the latest vanilla minecraft, and tell me, what do i do after i beat the ender dragon and wither and i get a big fat stack of diamond? go on, tell me. what am i going to do, build a bunch of buildings and stuff? well, eventually building stuff is gonna get boring, especially since vanilla has a lack of materials and things to build with. thus, vanilla mc will become a bore to me, and i will stop playing it, as i have. modded minecraft adds way more things to do to the game, including after this. it's fun doing things like building all kinds of machines from basic computers to complex factories, etc. you aren't stuck with certain mods, either. if you don't like what a certain mod does to the game, simply keep the mod out, or if there's parts of the mod you want to keep, disable the annoying parts of the mod in the configuration files (which are, by the way, self-explanatory). hell, 1.7.10 modded minecraft can still be more fun than vanilla 1.12.2, and in fact, 1.12.2 already has a whole bunch of fun and interesting mods on it.