Its pretty easy to slap a new label on a card and call it enterprise. Consumer cards can be kept from eating the enterprise sales by creating artificial barriers around what you can do with each line of card.
He's referring to the fact that the GeForce line of consumer grade GPUs and the professional line of Tesla HPC Compute cards are probably using the same silicon.
I thought Tesla GPUs are tested to higher standards (e.g. Stable at higher clock speed) and don't have disabled/faulty cores. Consumer GPUs have GPU cores disabled permitting higher silicon production yields.
Core disabling and under clocking are what's known as "product binning" and it's why you have 4, 6, 8, and 12 core CPUs. Tesla GPUs are probably the cream of the crop but they're still cut from the same cloth.
Not OP, but my guess would be he meant GTX 1080, Titan & co. I would bet the difference in price in comparison to GTX 1050 doesn't come from increased manufacturing costs.
I think he meant GeForce vs Tesla. The GTX 1080Ti is at the higher end of the GTX line yet it's one of the best in terms of "dollar to performance ratio".
EDIT: even the Titan Xp while being much more expensive than the 1080Ti is still vastly cheaper than Teslas