If you feel this is an undesirable detail there are many other table bases which feature adjustable feet that are not visible from the top, including:
Please note that adjustable feet will not stabilise a table where:
- the top is not fixed properly to the base
- the base is assembled incorrectly
- the table base has some flex in it (some budget options do!)
Alternatives to adjustable feet include self-levelling hydraulic glides such as Flat Equalizers or using a Stable Table which is a self-levelling table base. You might also consider buying a three-legged table base as these are self-adjusting by default.
A three-legged table will never wobble on an uneven floor because any set of three points is always coplanar (they all lie in the same plane).