That is horrible advice about taking a ground contract in an attempt to later secure an air slot. With things being what they are now, i.e. recent redstripe of FRS Hornets, 6-7 month wait times to start in the FRS (101 at least), not to mention a crazy slow journey through primary right now (have a buddy in corpus who classes up in SEP 09 and hasn't flown once yet. yes, seriously), there is little to no need to add more guys to the mix and inflame the problem. So even if you were lucky enough to even be offered to take the ASTB at TBS, you could straight up ace it and still not get a slot. Or even worse, be told you could compete for a slot only to have them not even offer the test in the first place.
If this risky path is the only possible road to an air contract these days, then it is up to the individual to make that "informed decision" on how they would like to proceed. Every Marine is a rifleman no doubt, but if you accept a ground contract thinking you might pick up an air contract, you might find that statement is in fact completely true. Ground guys are the absolute balls, but just know if your heart is set on flying and you accept this crazy offer from an OSO, stand by......