Well, life is about trade-offs and neither spaces or tabs are perfect in every scenario, but the industry overall prefers spaces over tabs nowadays and the tooling reflects that too. For me personally, as long as a project is consistent in its formatting and developers don't need to fight its tooling, I'm happy with either. We can yak shave all we want (and lots of people are doing that on the internets) but I hope I at least answered your initial question about why people prefer spaces over tabs.