How much are the tubes with the dope inside them already? Or what are they called?
That sounds like a possible good solution for me. I get a lot of flats on my one bike and would be willing to try that over buying some stuff and dealing with pooring it in my valve stem and simultaneously spilling it all over my floor, then having the tube explode while I'm pumping it up cause I didn't put it in right and having it all over my ceiling.
Per our earlier conversations, you need to collect the data. Do the flats happen in the same place, same wheel, same circumstance.
Recall or mark where the tube was in relation to the tire and the wheel. Then find if the hole is toward tread, spokes, or a pinch flat etc.... If the hole faces tire check the tire in that spot both inside and out. Bend it to see if a little thorn or bit of sharp object is buried in it. If it faces inside make sure there's no burr catching it, that your rim strip is smooth.
Also try my earlier suggestion of different brand tube. I was getting a lot of flats with two brands of made in Asia tubes and got some more expensive made in France Michelin at Yellow Jersey which took me back to reliability. A few extra $ was almost 100% my one measure but a bargain to not waste time with flats. The more expensive Michelin tubes were also patch friendly.
There are also simple skills for patching and changing tubes that escape some. Read the instructions and note the sanding, and how the glue should not be wet. When you mount a tube and tire do it with care and in a way that all of tube, tire and rim are seated well. I use talc powder to help seat everything well.