Soulknife_Infiltrator
Villager
You see, skill proficiencies provides you nothing but merely a +2/+3 in your checks. You're only better than others in two specific skill with 10%~15%. Besides that, Bard, Ranger also has Expertise, JoAT, PWT, and a D10(5.5) on failed skills checks are much stronger than Expertise statistically. Reliable Talent is the only way they exceed other classes in skills, but Level7 still means The End for many campaigns.Rogues start with 4 skills and expertise in 2 skills, from level 1. They get 2 more expertise at 6th level and then reliable talent at 7th. Their subclasses then further boost their skills, with Arcane Trickster getting cantrips and spells which can boost skills and other out of combat elements, Assassin getting bonus proficiencies and Infiltration Expertise, Thief gets loads of out of combat skills and abilities, and Swashbuckler is the only subclass that doesn't have out of combat abilities from the subclass.
Compare this to the fighter, which gets 2 skills to start, Action Surge, Second Wind to ability checks a very limited number of times per day. For Subclasses, Battlemaster gets you 1 skill, Brawler was nixed, Champion gets you Remarkable Athlete, and Eldritch Knight gets you cantrips and spells.
In the end, Rogue clearly outclasses the Fighter for out of combat stuff. Fighter got a boost in that realm but it's still not close to Rogue.
And, I mean, I really wonder have you really read my post and do the basic math yourself?