[45suited]

Take this for what it's worth from someone who plays the 33s and below:

The simplest answer is that I can't see folding here and calling and pricing in further callers, possibly to give up the best hand post flop is not attractive either.

IMO, you have a ton of FE by pushing. I don't know if this is true for the 55s but I've been noticing alot more of this mini-raising crap from UTG starting on level 3 recently. His range is WAY looser than you are giving him credit for, I believe.

As for pushing and running into QQ+ behind you, I think that's just a chance you have to take. Stuff happens.

In this spot, pushing JJ is almost automatic for me against a mini-raise. (Of course I have to again place the disclaimer that I play 33s and below. But judging from some of the hands I've seen posted, I don't think that my guess that we are often way ahead of UTG even in a 55 is way off.)