This is supported neither by facts nor by spiritual logic. The truth of the matter is that marriage does come with a huge burden as far as the spiritual life is concerned. There is a lot of energy that is absorbed in maintaining the daily routine of life as well as the upbringing of children. Relationships can be very demanding especially with the family expectations from both sides. Even in the best case scenario where both share a common aspiration and same spiritual path, living together can be quite challenging as egos clash while the yoga uncovers and lays bare all the bright and dark strands of nature one by one. Added to this is the problem of desire and attachments that can get compounded.
This does not however mean that being a bachelor makes it easy. It brings its own challenges if the vital is weak. The extra time and freedom may be wasted in worse things. Most importantly one may grow selfish and self-centred thinking only of oneself, one’s sadhana etc. The absence of close human love may make the heart rather hard and close to the energy of love.
The gist therefore is that ultimately no outer condition can be considered as specially helpful or harmful. It is the inner attitude and sincerity that matters.
Affectionately,
Alok Da