Always better to be safe than sorry. You did the right thing. especially since commercial bulbs can be replaced at modest cost. . Now, since lily viruses are a plant and bulb issue only, and not a soil issue, you can replant another group in the exact same spot this Fall (or even now if you like). Just be sure you have removed all the remnants (loose scales, roots, etc) of the sick plant and you're 'good to go'.
Judging from the appearance of your plant otherwise, your soil appears to be in excellant condition.
