Sorry this the logic that conventional commanders have used for eons for decades. Doesn't pass muster. Why do SOF officers in other countries manage to go higher ? Thye have command staff colleges to get them to mission shift.
SOF operators and officers on avg have a higher IQ than normal military.(there is a wide ranging of social / capability studies to support that).
They have a far greater entrepreneural spirit to problem solve and overcome. And SF officer would be a massive credit to the Larger military.
A great part of what you have articulated is the very reason why the larger army is stuck in the 1980s.
Your reasoning appears to be a justification for College Professors to be appointed as Brigadiers and Generals. This high IQ high exposure logic is bunkum and sounds like that one examination logic of civil Services or higher in merit logic that used to be advanced earlier by mud corps officers.
Our SF officers is the average Sainik School /NDA dude who can not even pass good examination and I am sure that IQ Screening is not carried out at intake level. It is only his upbringing and training during and after training that makes an officer a better dude, and that is true of any regimental officer of the Indian Army whether from ASC or Infantry.
There is nothing called Class A and class B officers in the Indian Army. If an SF officer is considered fit to command a brigade without adequate education, training, and exposure, I would place an ASC officer ahead of him who has more of that experience and exposure..
An SF is credited with all the good things he might have done, for his honours and awards and he stands ahead of all but when it comes to competitive environment of selection process, well I do not consider him fit enough to command an Assam Rifles battalion.
That is the truth of environment and organisational constraints because the Indian Army is not an SF battalion. It is an all arms application organisation. All those who rise from SF environment rise on the merits of their training, education and exposure to like all others and not merely for their SF.