Schumacher matched Senna's mark of 41 at Monza, in 2000 which was a big deal (that's when he cried) but the Most Wins record belonged to Alain Prost at 51. He broke that in Belgium in 2002. While it's an impressive total, as is Hamilton's matching (and no doubt significantly bettering) of it, but neither are that surprising in the grand scheme of things. Both have had the benefit of being in significantly superior cars for the majority of their careers (Schumacher's Ferrari team won 6 constructors titles in a row between 1999 and 2004 and Hamilton's Mercedes have won every title since 2014 - even Vettel in joint-4th was with Red Bull, who won every title between 2010 and 2013). This is not unlike many of the top drivers in the past, but I would argue that with rare exceptions (Williams in 92 for example, McLaren in 88) the difference between the top 2 or 3 teams hasn't been as big as it has over the past 2 decades, even though the team winning has changed.
The other major factor is the huge increase in reliability, particularly over the past decade but this was evident even in the mid-2000s. How many races did Prost, Senna, Mansell, et al lose because of car failures? Great drivers, consistently in the fastest cars, that rarely break down (Bottas's power unit today being a rare exception - his 4th reliability failure in 4 years at Mercedes - Hamilton's had 1 in that time) are always going to win most of the races. It'll be the same until Mercedes mess up or Hamilton retires and then someone else will likely take up the mantle - Max Verstappen is 23 and has 9 wins - if he gets in a dominant car for long enough he could well challenge Hamilton's eventual record in the future but we'll see. The race behind Hamilton-Bottas-Verstappen this season is thrilling, 6 teams and 11 drivers in a different order every week.
And without wishing to be a downer (that ship sailed), Raikkonen's record won't last the test of time either - Alonso's back next year and just a season behind Raikkonen (although that depends when they both finally give it up) but Hamilton's just over 3 seasons behind Raikkonen and potentially got a good few more in him if he stays interested. Verstappen's already a third of the way to Raikkonen at 23! Kimi couldn't care less about the record, but it's impressive nonetheless - the power of being quick and not ruffling any feathers along the way.