All good points fellas.
The main problem is that many misundertand what strength and conditioning (S&C) is, and as such the "baby can get thrown out with the bath water!"
With S&C now seeming more fashionable for fighters, there are those jumping on the band wagon and calling all kinds of training strength and conditioning - CrossFit being the most obvious example.
There are a handful articles I've written that I urge you to have a quick read of, that will hopefully clarify few things.
What is Strength & Conditioning Exactly???
heatrick.com/2013/04/21/what-is-strength-conditioning-exactly/
Muay Thai Skill vs Strength & Conditioning
heatrick.com/2014/02/02/muay-thai-skill-vs-strength-conditioning/
Weight Training Making You Too Sore For Muay Thai?
heatrick.com/2014/01/12/weight-training-making-you-too-sore-for-muay-thai/
Here's some stuff I've written regarding postural weakness resulting from extensive Muay Thai practice...
Is Muay Thai Bad for Posture?
heatrick.com/2012/11/19/is-muay-thai-bad-for-posture/
Correcting Muay Thai Posture Compensations
heatrick.com/2012/11/26/correcting-muay-thai-posture-compensations/
Best regards, Don