People preach it because like it or not it's the truth.. There's no way you can spot every single egg on all the bases forever.. You may come out of this one you may not people are just looking out for you honestly.
Just do a simple search of people who dealt with or are dealing with them. I'd bet some if not most had the same thinking you do at this point of " there is no way any have gotten in my tank" and all sudden they are losing thousands of dollars in acro's and tearing the tank down to quarantine and dip what's left. It's just an easy precaution that can be made to basically insure you don't get any eggs in the system.
I truly believe there is no possible way you will make it the long run putting those bases in your tank but it's your choice to make.
They are looking good though =) and I hope your remark of them being easy as all other acros keeps true for you as that's not the case for most..