As noted, it's really Object Pascal VS Python or like the Lazarus IDE VS the PyCharm IDE. However, this type of confusion, where people refer to the IDE instead of the programming language seems emblematic with Object Pascal. There appears not enough marketing or publicity to pierce the mind share of the general public, or even the programming community. Way too many times, I have seen even programmers refer to the Object Pascal language as Delphi, or be clueless that Pascal evolved into Object Pascal. Their only recollection of Pascal being Turbo Pascal and some high school or college classes using it in the 1980s.
Part of this issue of public mind share, appears to also come from having large company or OS backing. Java had/has Sun/Oracle, C# has Microsoft, Python has the Linux community and distros, etc... Swift is debatably popular because Apple pushes it very hard. Object Pascal doesn't have heavyweights on this level behind it, so it has to grow from a more grassroots perspective. There is of course Borland/Embarcadero (Delphi), but they weren't/aren't on the same level as the other companies mentioned. Embarcadero tends to fumble a lot, like Borland before it, and seems to put greed before long term planning. I could also see Embarcadero/Idera disastrously dropping Delphi, even now, and pushing Java or C++ products if thought they could get away with it or make an extra dollar.
As for the popularity of Object Pascal, I think it is being used more than people think. There are a lot of dialects, compilers, and IDEs floating around. Many schools throughout the world are teaching Pascal/Object Pascal or using Delphi. Let's not forget Embarcadero's deal with Turkey, where they sold over a million licenses to their school system. I think that in the United States, Object Pascal gets pushed to the side, because you have large American companies pushing their favorite programming language and trying to convince everyone that all other languages are "dead".
Lastly, it does seem that those using Object Pascal are a bit quiet for competitive reasons. Seems like they don't want people to know their secret sauce, and rather people bang their heads against the wall using Java or Python. I think a significant number of people, if they were clearly aware that Pascal became Object Pascal and what it can do, would switch over. But, the key is public awareness.