All your stuff would be historical artifacts a century from now. Do you ever just throw anything away? You should consider preserving it instead, for the generations that come after you. How will they feel if they knew you just threw historical artifacts in the garbage bin?

That is to say, keeping anything historical has its limits. If we always keep everything historical, we will keep literally everything, and the planet will be quite full pretty quickly, with no place to build anything.

We should be careful to preserve truly historically relevant things. But most historical things are just old trash...

the only reason they found all this stuff is because they had to dig deep to make this station, if they hadn't this stuff would just have stayed below ground because there was a whole city on top of this and it is not economically viable to just go dig for this stuff in the middle of the city.

Any large scale project will usually generate similar artifacts. They're just not usually put on display for the public.

Doing rescue archaeology is a common way for archaeologists to make a living in-between more interesting projects.

Wholly disagree here. The past has immense value, but, well, it's the past. Historical artefacts are only valuable through our cultural lense. I think I would always choose building the future over preserving the past.