Hi,
I have the impression that you very often tag areas that are normally tagged as leisure=pitch + sport=* as leisure=sports_centre + sport=* instead, e.g. soccer pitches, basketball courts, baseball fields, riding / rodeo arenas, tennis courts.
leisure=sports_centre, however, is for larger facilities, which often include several different sports fields, stands, buildings, etc.

On https://wiki.openstreetmap.org/wiki/Tag:leisure=sports_centre it says: “Note, a single leisure=pitch is not usually a sports center, leisure=sports_centre is for significant facilities. For example single soccer pitch in a park is not a sports center.”

Examples:
https://www.openstreetmap.org/way/1281766979 would normally be tagged with leisure=pitch + sport=soccer
https://www.openstreetmap.org/way/1281766980 would normally be tagged with leisure=pitch + sport=basketball
https://www.openstreetmap.org/way/1338137577 would normally be tagged with leisure=pitch + sport=tennis
https://www.openstreetmap.org/way/1367366494 would normally be tagged with leisure=pitch + sport=equestrian

See also https://wiki.openstreetmap.org/wiki/Tag:leisure=pitch#Examples

As mentioned, sometimes such sports fields are located within a sports center, the sports center itself can then be tagged with leisure=sports_centre. Example: https://www.openstreetmap.org/way/436751622 (Complejo Deportivo “El Cuartillo”) in Spain.

If you tag the sports fields as pitches instead of sports centers, this also has the advantage when editing that there are different presets for the most common types of sports fields. For example, if you want to map a soccer field, you can simply search for “soccer field”, select this preset and the tag sport=soccer will be added automatically. If you then select such a soccer field, you can immediately see that it is a soccer field without having to look for the sport=* tag.

In addition, the tag area=yes, which you usually add, is superfluous for both leisure=sports_center and leisure=pitch.