Originally Posted by Cat88L3

I hear everything that you are saying, but you are extremely overthinking this. The last 6 Jetblue flights I took this year have been completely full. I always take an aisle seat. I have booked with my row empty. I have booked with only the middle seat open.

I have booked in the back, middle, and front. Didn't matter because I never had a row to myself. Now that people are traveling like gang busters, the seats are full.
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If you want to luck out with getting an empty seat next to you, you can try the EMS seats, but that's not even likely nowadays