Well,the very first point I would like to make here is that our domestic structure is pathetic.
Most of the bowlers have to give up pace because of the amount of matches being played(which results in injuries) and secondly the pitches which do not support the faster bowlers at all,
The pitches are either flat, or the ones which offer turn, and the SG balls are used in India which help the bowlers who swing the ball in the air, all these factors give encouragement to swing bowling and spin bowling, faster bowlers don't get much rewards and also become injury prone because of playing 4 day games every week(bowling 40 to 50 overs a week) once the tournament(e.g. Ranji trophy) starts ,in most cases, the bowlers look to become line and length bowlers or swing bowlers and give up pace.
Our domestic structure has to be redesigned, there should be less, but quality cricket, players with potential should be given special training under a team of coaches(in NCA) to make them aware about what exactly they need to do to maintain their fitness for the highest level and their workload must be monitored. There should be proper guidance, if the selectors want a particular bowler, he should first be sent to NCA for 3 months, so that he is groomed properly and is ready for the international arena. Extra bowlers should be carried with the 15 or 16 member squad, so that they get an opportunity to be trained under international level coaches,physios,etc. and get the much needed exposure before they are actually selected.