Reddit mentions of Judge Universal Draining Lid for Saucepans (fits 6.25", 7", 8" and 8.25" Pans) TC275

IMO, Because there are better tools and techniques. They don't expect people laying down the money on pro cookware to be trying to strain food from water over a sink. Strainer lids can be convenient, but they are also a compromise tool, you don't always want a lid that vents, if you do want a standard lid to vent you can place it partially on. For the most part, you're better off removing the food from the water and letting the water cool (or reusing it for more food) rather than trying to strain food from almost boiling water out of a pot over the sink.

Then there's the issue of what to drain from a saucepan. Pasta is generally cooked in a larger pot and is best removed with a spider. Grains are reasonable for a saucepan, but done properly grains shouldn't need draining. Veggies are better done steamed where you'd remove a steamer basket and just dump the liquid.

Thing is though, there's no wrong in the home game, it's your kitchen, you can do it how you want. There are after-market strainer lids