No , I don't think so . People can be sexually active and spiritual at the same time .

Problem is that we prejudice sex as a cheap thing , nobody wants to talk much about sex , it is like taboo करना सबको है , पर बात नही करनी ओर कोई दूसरा कर ले तो उसको जलन के कारण घटिया भी बोलना है 😂.

We have a prejudice that as a spiritual person one should follow celibacy but at the same time we forget that sex is a harmonal thing and also part of the nature , sex is important to sustain life on this earth and if every body becomes spiritual like we prejudice it , no life will prosper on this earth .

It's a matter of age and sexual energy is at peak between 16 - 30 years .You just can't control it more you will resist it more it will shake your core . So there should not be any sense of guilty about attracting to other gender when you are also spiritual at the same time .( It does not mean doing sex without consent , it should be love making from both side)

Being spritual means peace of mind and doing good for others but it is not that you are married and you want to become spiritual fellow so you will leave your spouse , it's utter illogical

After particular age your sexual energy itself will disappear .

Here are some words of osho and sadhguru about sex do hear it

Sexual energy can boost your creativity because it comes from the same chakra, the Swadishstana Chakra, which is also the centre for money, inner-balance and a sense of self. If you have a healthy sex life you’ll feel better about yourself and create more possibilities for wealth.

Excess of everything is bad if you indulge yourself in multiple sex partner and you become a sex slave then it can be distarous for you , this same energy when become uncontrollable can easily destroy the person .

Nowadays children watch porn and it is posing a very negative mindset on children and there creativity get deteriorated. 

Sex should be pleasurable and it is more pleasurable with the person you love .

 There is concept of tantric sex in hinduism which is a combination of sex and spirituality. Tantric sex originates from ancient Hinduism and revolves around sexual practices that focus on creating a deep, intimate connection.

During tantric sex, the aim is to be present in the moment to achieve a sensual and fulfilling sexual experience.

Tantric sex is a slow, meditative form of sex where the end goal is not orgasm but enjoying the sexual journey and sensations of the body. It aims to move sexual energy throughout the body for healing, transformation, and enlightenment.

In the end I would say there is nothing wrong in doing sex during your spiritual journey but one has to follow some precautions and control over oneself to not to indulge in multiple relation sex .