Removing the TPMS sensor from an aluminum stem may be wise to prevent bimetal corrosion. However, removing them to check tire pressure makes me wonder. Are they incorrect? You bought the system to monitor tire pressure. I guess I would trust them to do their job.

According to the manual pressure pro "recommends" that the tires be checked "regularly" with a pressure gauge. This is probably a CYA statement.

There is absolutely no reason technically to routinely remove the sensors to check pressure. There might be a good reason to remove them for another reason - like dissimilar metals bonding them together over time, but not for pressure checks. Of course, that would not apply if you feel, or know, that your display is not accurate or consistent. But I have never seen a Pressure Pro that was not consistent.

If you are moving between high elevation/cold and warm areas you need to adjust the pressure if you are going to be in the new area awhile. But not if you are just driving through a mountain range.

And you do not have to obsess over a few pounds difference between tires. Just set them somewhat above what your weights require and check them with the display routinely (use the tables, and go a little higher, but not higher than the max innflation for your tire or wheel, whichever is lower). If they lose a lot of air you have ot deal with it, but if they just differ by a few pounds it is not neccessary to adjust them.