why isnt there more solo content for gold loot?

ive been having issues running dm and evg with people that refuse to play the game in away that benefits everyone.

examples.

some people cant afford multiple sets of gear so they run with what they got. this is understandable

how ever this isnt.

i know a few people who are super geared and refuse to swap gear to maximize damage at bosses.

i realized if you take 4 of these type players and make them run evg or dm theyll get really pissed off at each other.which is interesting because it shows these players understand that things can be done a lot faster.

i realized that hotbars and swapping multiple sets created this huge barrier. not only for people who cant afford to play the game that way but even for the people who can.

so im at a point where i refuse to run with randoms. i also refuse to join guilds because both these type of players exist in them.