It's helpful if you want to join gay clubs and so on. When you have a support network, people take you places, introduce you, you meet new people through them. If people see that you are integrated, they will be much more open to your trans status. They take their cue from how other people behave. If they see that cis guys are friends with you and think you are a normal guy, they will behave the same way. At least that's my experience.
So you can do it on your own, but having bunches of gay friends makes it so much easier. And more fun ;-)
It's not that I went there to "use" cis guys, rather the other way around.
I liked to be friends with gay cis guys anyways, and noticed that the outing and dating situation was pretty easy for me, compared to others.
When I moved to another place where I didn't know any cis gay guys, everything was a lot more complicated.
This only works, if the cis guys are open minded, of course. You wouldn't want to get involved with transphobic idiots.
Basically, dating while being socially integrated in some context is the normal way of dating, I think. You meet potential dates through networks with shared interests, shared values etc. When you meet someone at a friend's birthday party, you can assume they won't be that terrible - not so much on the internet or with dating apps where you talk to complete strangers.