Two Plants --1 Pot to rule them all

Two plants in 1 pot. The internet says this is a terrible idea and they will fight for nutrients and struggle but I think I can give them all the nutrients, water, and lights that they need. Since I can't transplant the autos their roots should fill the pot out faster w/ two plants therefore I can cycle much earlier and better. This could be a total disaster but that's the fun in growing!