Even if Tommy never made contact with children on the set - allowing him to be displayed publicly as being a "good person" as was done would naturally lead parents who saw him (on the air and during public appearances at churches; featured or pictured on literature etc.) to think he was a safe person to privately be around their children unsupervised.
Tommy is a celebrity and public figure at 3ABN. Although he was known within the Church of God, his national and international public image was created at 3ABN. This didn't happen passively and couldn't have been done without the co-operation of the power brokers at 3ABN (many of them celebrities and public figures themselves), Lomacang being only one of them.
Edited to clarify my thoughts