I personally wouldn't make a decision until I knew what risks there were to the removal process itself. The sealants degrade over time--they don't last forever. I do know that BPA is released as the sealants degrade, I'm just wondering about the dangers of the removal process itself with regards to the possible release of BPA all at once or possible damage to the teeth. Has your dentist explained the process to you at all?
We ultimately decided against sealants for our ds because of the BPA issue. There is one brand that is advertised as being BPA free, but the chemical reaction the sealants undergo as part of the natural degradation process does release a BPA-like substance. So essentially the BPA free sealants aren't totally BPA free.
Also, we are of the belief that nutrition plays a bigger role than hygiene in keeping teeth healthy. If you are really concerned about cavities you could do some research into cell salts, high vitamin butter oil, xylitol. There are lots of threads about people who have healed their cavities with dietary changes and have lots of advice on prevention as well.