You have no trouble understanding the need to dress up when going to a job interview. This is showing respect.
Everyone has a different idea of what “dressing up” means.
To some, a woman is only dressed up if she is wearing a dress, hose, and dress shoes.
For me, I am dressed up if I’m wearing a pair of slacks that are not blue jeans, and a t-shirt that doesn’t have a sports team on it. I wear tennis shoes everywhere, even to play piano at a concert (or organ shoes if I am playing the organ, but only to play–not to walk in–for me, they’re too painful to walk in.)
I only own one wearable dress, and I wear it over black leggings because I’m self-conscious about my arthritic knee, and I’m not able to wear dress shoes because of my deformed foot.
I’m also rather overweight (about 50 pounds), and although many large women dress very fashionably in the latest “plus size” fashions, I am uncomfortable showing too much of my flabby arms, and I don’t want to wear anything that “shows my curves.” To me, it’s fat, and everyone can see that it’s fat, and I’m ashamed of my weakness around food. Also, it doesn’t help that my arthritic knee and deformed foot make it impossible for me to walk more than a few minutes before I need to sit down.
I could go on, but what I’m telling you is that you have no business judging what others wear. There are reasons why people dress the way they do. I’ve tried in this post to be brutally honest about why my idea of “dressing up” probably doesn’t match your idea of dressing up. Other people have even more compelling reasons to dress a certain way (e.g., people who wear bladder control garments under their clothing may not feel comfortable in “dress” clothes).
My dear father-in-law has multiple disabilities due to three back surgeries (botched, IMO) and a bad knee, as well as hearing loss and macular degeneration. His idea of dressing up is a pair of very baggy slacks (which are easy for him to pull up and fasten) and a long, tunic-like Western Wear shirt which is also easy for him to put on. The stores where he used to buy his suits (Sears, KMart, Carson-Pirie Scott, etc.) have all closed down in our area, and the “trendy” stores do not have suits that fit an old man with a lot of disabilities who doesn’t want to spend a lot of money because he’s pretty certain he will die soon.
Please have some mercy.
As for kids coming in soccer outfits–you have no idea what a witness these kids are to the others on their teams when they tell their coach, “I’m going to attend Mass, but I’ll be back in time for the game.” This is so rare in sports teams! And don’t try to tell anyone that they shouldn’t be on a sports team that competes on a Sunday! WHEN ELSE are they supposed to compete?! During school? And when else would the parents be free to come to the game? AND for many kids, sports are a means to earn a scholarship to college–I have several friends who couldn’t afford college, but their kids earned scholarships through their soccer, volleyball, basketball, softball, or gymnastics.