If you have infinite probes then any skill element is removed - just spam them until you have complete coverage.
At which point the only difference between firing one probe and having the entire planet scanned and firing multiple probes is the amount of time spent doing it.
That would fall under the common definition of 'grind'.
I've only really read the OP and your reply + or - a few others. Wouldn't the best option be that you don't get infinite probes but when you synthesise them you get loads of them; like 10000. So you have to do something about it eventually but it isn't a grind?