I am the growth mindset, so far as that image in the OP goes. Outside of Elite, I persist and endure, completing challenging projects even for recreation and aesthetic enjoyment. Other people often tell me I'm nuts.
But so far as Elite goes, IMO it's critical to clearly define "challenge". Personally, I've never considered being randomly killed for no reason a "challenge". Elite gives us some darn simply ways to avoid this, even if Open play was the only mode. So long as the ship can survive the FSD charge, escape can be very probable.
When I think of multiplayer "challenge", my mind goes back to my many years of PvP FPS game play. Years in UT2004, playing vs. some seriously good players, practicing for hours, and loving it all, even the losing. That was a challenge for me, I got pretty good, but I never got ACE good. And then playing WW2 combat flight sims, again the same thing, practice, building skill, and facing the best I could find.
But Elite multiplayer doesn't work that way. I don't have the right ships and gear, and I've got to do A DANG LOT of other things (some of which are very uninteresting for me, personally) to get there. Engineers made this even worse.
So while I did buy Elite for the PvE type stuff, and the PvP forum videos are fantastic fun to watch and spur that desire to participate... I realize that I'm so far from just getting the gear (not to mention breaking up my enjoyment of role-play aspects with my CMDR) before I can even start serious practice. I can tell from the beginning, I don't want to do what it takes to get in position, so I just continue with the PvE/Solo/PG play I originally came for.