You make a good point there that also applies to Indian air force as well.
I suppose there are both pros and cons to operating a lot of different type of fighters.
India is very different situation given its scale and where its coming from and going to.
There is literally no pro for India to remain with "Soviet/Russian" only after the large mig-21 commitment in the 60s/70s (driven by geopolitics mostly which carried inertia to later acquisitions).
The choice to go for jaguars (given soviet A2G platform was far inferior at our squadron strength) and then mirage-2000s (again to get qualitative window in A2A) had precedence with pre mig-21 era too (mysteres and so on)....given the level of trust we invested into France long term.
We simply stockpile and/or produce locally whatever is logistically sensitive....something just not available to smaller countries (given their order and future order potential esp laterally into C4I and weapons is far lower).
France and Israel for most part count as long term western tech provider to us (and at the inside-out system approach, which was simply never achieved with USSR tech which relied on quantitative approach).
It is quite strategic and conscious decision.
ISRO would be nowhere close to where it is now if we were stuck with "just" US (Scout/Kalam) base, Russian (early cryogenic) or French (Viking UDMH).
Logistics issue play minimal role in it if you develop the long term strategy. If a country has a large absorption+deploy potential, it makes sense to not limit yourself when geopolitic options opens up with time.
You also have to factor in what are the roles within something as big as IAF, what are air superiority versus multi-role vs A2G and sensors (AWACS) etc..... as these all have different intersections with their relative logistics to begin with (like say overlap between France, Western, Israel and local Indian versus Russian....as you can double dip with lot of former category).
A smaller thing like drone dont necessarily have that same concept to harness....so a medium or small country would likely face problems at its scale since it just make sense to commit to one supplier....very different to India.