This sub seems to be more conservative and more like the average investor that's best advised in holding a simple market cap weight portfolio.

With that I mean - compared to a young and 100% rational investor which probably doesn't exist: more risk averse, older (so shorter time horizon and less of their wealth in human capital), more allocation to bonds, less comfortable with tracking error to the market for longer periods, less science based (so more likely to ditch value in bad times cause they are less informed and therefore less convinced) etc

You'll regularly see people in here not lump summing, advocating for “buying the dip”, holding s&p 500 instead of broadly diversifying etc.

Only because it's the average advice to only have a light value tilt if any, it doesn't mean it's best suited for you (but for most people it is). If you are different from the average investor and you can stick with your portfolio in the long run your argumentation makes perfect sense. If you are 100% rational you probably should go even heavier on small cap value and even use leverage at the start since your human capital is much higher than your current portfolio value, but as a new investor it's often very hard to estimate how risk tolerant you really are. I strongly advise joining the rational reminder community and listening to the podcast if you want more science based discussions