There are many cases in early days of bitcoin, when people used to send bitcoins to each other for fun and for free. Lots of such coins can't be accessed now because the owner lost the seed due to his casual attitude towards bitcoin.
even if such lost coin is recovered, the question is, of what use is it? certain constant like the irrecoverable nature of bitcoin was access to ones keys is lost is one way that helps strengthen the network and doesn't allow for what will look like an alteration or manipulation of any sort in a bid to recovering some lost coin. a further improvement that could be more useful would have been an inclusion of an alternative to the seed phrase such that even when you have lost it, there could be other ways of getting access to your coin so it does not remain lost forever.