I agree with the premise that a carry pistol requires daily attention.
On the other hand, there are many people who use far too much oil in and on their pistols. Oil collects dust, lint, powder residue, and other crud that can build up and cause function problems.
A light wipe-down with a rag dampened with oil is usually all that is needed on a daily basis. Leave the piece out of the holster when not in use, and leave the holster somewhere with air flow to permit evaporation of the moisture it has absorbed.
Weekly field stripping, cleaning out the internals and oiling them very lightly will keep everything working properly. Something many people never do is to drop the floorplates of their magazines and clean out the internals periodically (I like to shoot up my carry ammo every 6 months, clean the mags and load with fresh ammo).
Final note: Choose your lubricants with care. Some oils will penetrate, and oil residue in the pistol can penetrate primer pockets in your ammo and kill the primers. WD-40 is noted for this, but some general purpose oils (3-in-1 type, sewing machine oils, etc) are nearly as bad. I like the military grade lubricants, which are probably the most thoroughly researched and highly developed products around. I bought a couple of quart cans of LSA (Lubricant Small Arms, which we used in the Army for everything from rifles & pistols to the M60 and M2 machineguns) for a couple of bucks at a gun show about 25 years ago, and I'm still using that.
One pound tubes of pure white lithium grease can be found at the auto supply stores for a dollar or two, and that is some of the finest lubricant available.
A light coating of Vaseline works great on a pistol's internals and costs next to nothing.
Johnsons Paste Wax works great on all external surfaces, providing excellent protection against moisture, and a single can will last for decades for this purpose.
Bearing surfaces in the pistol (slide and frame rails) can be rubbed with the "lead" (actually graphite) of a #2 pencil, and this provides excellent lubrication without any tendency to collect dust, lint, or other crud. Last time I bought pencils at the office supply store they were about a dollar per dozen.
If nothing else was available I wouldn't hesitate to use a drop or two of good motor oil. It is formulated to provide good lubrication under pressures and temperatures far in excess of anything a firearm is likely to duplicate.
It is not necessary to purchase the high-priced firearm-specific products. There are plenty of good alternatives, many of which you probably already have in your house.