Hey. Yes you. Dont waste time trying short temporary fixes like tilting the Blu-ray laser or using some special lens cleaner disc or anything similar to that stuff.
The laser burns out over time. Quicker when a disc used was one with finger print or scratches. The laser has to try harder to read the data on the disc where the surfaces are damaged or smudged. The laser ends up burning up faster just because of this.
And when it comes to burnt lasers almost all the time the user either plays FIFA or GTA. Both of these games use the laser like the most intensively.
Under heavy use the Blu-ray laser usually lasts a year or two. 3 years if you're lucky and take care of your discs.
In conclusion, yes the laser needs to be replaced.
If you are not confident in replacing the laser then I do not recommend doing it yourself as I've had clients before come in with a damaged PS3 Blu-ray drive board just because they didn't have the Blu-ray cable plugged in properly from the drive to the logic board of the PS3.
In the end that client was stuck with a PS3 that can't read Blu-ray discs since the drive board is stuffed and is not replaceable as every drive board is unique and linked only to the PS3 it came in.
So yeah consider taking it to a business that repairs ps3s.