What makes me think that it was a bad move is the countless people, like myself, that say they would be buying a PS4 pro if it had a 4K BD drive. It’s clearly hurting sales.
Sony clearly made the right decision, as November NPD proves. Even with the launch of XB1-X (with UHD drive) and XB1-S (also with UHD drive) going below $200, PS4 still ended up winning the month in hardware sales even with neither base PS4 nor PS4 Pro featuring a UHD drive.
Why is that? It all comes down to price. By not including the UHD drive in the PS4 Pro, they saved on the cost (let's say $25-$50) and this allowed them to be more aggressive in their promos. Deals like $350 for (PS4 Pro + game) or $300 with Amazon trade-in promo only happen with no UHD drive. Sure, they sacrifice a few potential customers like you for whom no UHD drive is a dealbreaker. But they pick up scores of others (like myself) who are more convinced by the lower price. It's a calculated tradeoff, and it worked (that's why PS4 Pro has consistently comprised ~20% of all new PS4 units sold).