Lmao, he sure was handed finished products in early 10s Ishant , Yadav and Shami - they were absolute trash at that point of time.
Everyone hated him and bewda for playing Bumrah and Shardul during their debuts.
Not giving him credit for the pace bowling culture is ridiculous.
by the time you're playing Test cricket you're more or less the finished product. They've definitely improved in the National set up, but they had all the raw ingredients by the time they were picked.
By all means credit Kohli for backing the quicks and sticking with them through their development phase, but he's no way near the 'main factor'. He didn't scout these guys as kids, didn't teach them how to bowl fast, didn't pick them through various age group and domestic cricket tournaments. He did not have a role in the setup of various pace academies, A tours, or the improvement of domestic pitches and schedules to better suit the development quick bowlers. He may have established a high fitness culture, but he is not the physio, he is not setting S&C programs for these guys, and he is not managing their workloads.
You're literally looking at the tip of the iceberg when it comes to producing the fast bowling talent we have now. Kohli insisting on a pace-heavy attack and backing them is great, but the talent he has at his disposal is only possible thanks to the structural changes in Indian cricket that have come about in the last 3 decades, which is thanks to the work of thousands of individuals at all levels. Kohli is not the 'main factor'.
If anything, the IPL is the main factor. Franchises realised top quality pace talent was essential to winning T20 trophies, and put in a lot of legwork themselves to identify, recruit and develop talented locals so they wouldn't have to rely on foreign players. The IPL has accelerated the improvement of our pace bowling IMO, and it's where we found players like Bumrah and Siraj.