I haven't played Ingress myself, but a couple of my buddies during our studies did. But to me, the two core problems that come with it are very similar to gaming in an competitive environment:

a) There are always nerds that are better than you (and in some cases make your work worthless)

b) Don't let it overtake your life and prioritize it over other important stuff (like family)

It reminds me strongly of the time when I played vanilla WoW PvP where you still had ranks 1-14 you could progress through. The problem with it was, that your performance was measured and compared against on how well others did. That means only one person could be rank 14 on a whole server for a week. That was the one who was "best", no matter how well you did. It trickled down to maybe 2 handful of people for rank 12. At the end, when it got real competitive, it was more politics and actual gaming. We had partner guilds from the US (I live in the EU), that would log on and idle/play with our characters, so we could get points while we slept. We had agreements with other guilds on our server, which guild would get rank 14 next week and according to that the other guild would play slightly less. The battlegrounds weren't even playing anymore, because at one point our guild was so well-known and dominant, that the enemies didn't even play anymore, they just hid with the flag and tried to stall our progress.

During that time I put far too little time into school and my girlfriend at that time. I was happy she did it, too, because I felt we we're playing together, but in the end - and I only realized that afterwards - we weren't really communicating or doing stuff anymore together, it was just idling in the game basically. Thankfully Blizzard removed the PvP ranks shortly after I reached rank 12, and that was the end of it. At least I got quite a bit of money for that account on eBay, but would I do it again?

Nope! I had fun doing it at the beginning and then stuck around just for the sake of reaching a higher rank, but in the end it was comparable to work and I knew, that there were always nerds that are going to spend more time in the game than me and it's not worth the dents the relationships in real life took. As long as you have fun doing it without consequences, go for it, but you should also know when to stop and start not seeing a point in the time wasted anymore.